Machine for manufacturing packages



March 9, 1937. E. s. D. VON SEGEBADEN El AL 29411739432 MACHINE FOR MANUFACTURING PACKAGES Filed Jan. 10, 1934 2 Sheets-Sheet l 2 Sheets-Sheet 2 E. S. D. VON SEGEBADEN ET AL.

MACHINE FOR MANUFACTURING PACKAGES Filed Jan. 10, 1934 March 9, 1937.

I 1 machine? and Figure 41s a crossv sectional view of said "part Patented Mar. 9, 1937 UNITED STATES PATENT OFFICE MACHINE FOR MANUFACTURING PACKAGES tion of Sweden Applicationlanuary 10, 1934, Serial No. In Sweden January 12, 1933 16 Claims.

The present invention relates to machines for manufacturing packages containing pulverulent, granular, flaky or plastic substances and is especially well adapted for the packaging of flour or similar material.

When manufacturing original packages of such kind it is very important that the package has an attractive appearance and is regularly shaped so that its quality as an original package may be prominent. If it is possible to obtain a regular package shape its attractive appearance may as a rule appear.

In extensive manufacture of such packages bymeans of hitherto known methods and means 5 it has proved difficult to supply material to the bag or the like in such manner that the regular shape desired is obtained, and this is particularly the case when such packing material as flour or the like is treated which has a considerable internal friction and is likely to obtain an increased remaining concentration.

An object of our invention is to provide a machine of the characterindicated which will enable manufacturing of finished packages of the desired regular shape irrespective of the kind of filling material.

Another object of our invention is to provide means for imparting to the package approximately the desired shape when material is supplied thereto, and moulding means for subsequently or simultaneously correcting still remaining irregularities as to shape.

A furtherv object of our invention is to provide means for preventing material from accidentally gaining access to said'moulding means. Still-a-further object of our invention is to provide means for holding the package tightly. 7 against material feeding means with the view of obtaining auniformpreliminary shape of the package when supplying material thereto.

our invention consists in certain novel constructions and arrangements of parts which will be hereinafter .fully described and pointed out in the claims; hereunto appended reference being of; the specification and in which: Figure 1 is a side elevational view partly in .section of amachine embodying our invention;

Figure 2 is a front elevational view of'the'machine; g

' Figure 3 is a longitudinalsection of partof the V55 taken on the: line iv-,-rv;or FigureB. in

had to .the accompanying drawings forming part Referring to the drawings 2 is an intermittently driven conveyor for moving empty bags I step by step in the direction of the arrow (Fig. 2) into position in front of a wall 3 whereupon the bag will be enclosed by three other walls 4 rigidly connected to one another, so that the wall 3 and the walls 4 constitute a preferably rectangular open top ended chamber in which the bag is positioned as shown in dash and dot lines in Fig. 1. The upper edge of each wall may preferably though not necessarily have a revoluble roller 5.

A bag elevating plate 6 is mounted on a sliding rod 1 which is pivotally connected to a lever arm 8 pivoted on a rigid shaft 5 in the machine frame it). The lever arm 8 is provided with a shoulder H and rigidly connected to another arm l2 which has a pivoted finger l3, actuated by a spring It to engage a stop screw 15 on the arm i2. The finger I3 is adapted to turn a switch It to the right, when the arm I2 is swung in such direction. In addition alever having three arms is pivoted on the shaft 9. One of said arms indicated I1 is pivoted to a forked link l8 and longitudinally reciprocating movements are imparted to said link by a cam 20 fixed to a driving cam shaft l9 and by a tension spring 22 which forces a roll 2| against said cam. Another of said arms indicated 23 and connected to the spring 22 has an adjustable stop screw 24 adapted to engage the shoulder II and hold the arm 8 in a depressed position against the tension power of a spring 25, one end of which is connected to said arm its other end being connected tothe machine frame. The third arm indicated 26 has an adjustable screw 21, adapted to move the switch Hi to the left.

The three walls 4 are supported by a sliding rod 28 pivotally connected to one arm 320i 2.

bell crank lever. The arm 32 1s actuated by a With these objects and advantages in view tension spring 30 so that a roller 3| on the other arm of the bell crank lever is forced against a cam 29 fixed to the shaft Hi. This mechanism imparts regular reciprocating movements to the walls 4 to and from the wall 3.

Above the walls 3 and 4 there is provided a hollow casing 33 serving asa supply pipe and connected to a feed hopper 34. The casing 33 encloses tightly two feed screws 35 (though more than two screws may be provided) rotated'by means of a 'gearing 36 driven by a motor 31. The motor shaft may beconnected to a shaft 39 by means of a gearingfand a clutch 38 and the rotary movement of the shaft 39 is transmitted toth e gearing 36 by means of a bevel gear".

4|. The engaging and disengaging respectively of the clutch 38 is eifected by means of an arm 43 fixed to a rock shaft 42 and embracing a clutch inember 44 longitudinally slidable on the shaft 39. Another arm 45 fixed to the shaft 42 is pivotally connected to a vertical rod 46. The rod 46 is provided with a flange 41 and an iron core 48 enclosed by the coil of an electromagnet 49 which is connected to an electric circuit including the switch l6, in such manner that the core 48 is forced downwards when the electric circuit is closed. A tension spring 50 has a tendency of forcing the rod 46 upwards.

Preferably but not necessarily the feed screws 35 intermesh and extend in a common supply channel. The casing 33 has exterior longitudinally extending curvatures 5i connecting the two opposite parts of said casing which enclose the screws 35. The bottom end of the casing is bevelled at BI so that two points 62 are obtained.

Moreover said bottom end is covered with a lattice 63 or the like.

The ends of two opposite arms 53 positioned in the proximity of the casing 33 carry rolls 52 and are fixed each to a rock shaft 54 and connected to one another by means of segmental ears 56 on arms 55. An arm 57 is fixed to one of the shafts 54 and pivotally connected to a rod 58, which is forced downwards by a spring 53 to engage by the intermediary of a roll a cam 60 fixed to the driving shaft I9, which latter will thus impart vertically reciprocating movements to the rod 53.

An arm 65 having a tongue 64 is fixed to a swinging shaft 66, so that said tongue is positioned in front of one of the curvatures 5i of the casing 33. Another arm 68 actuated by a spring 61 is fixed to the shaft 66 and said arm may be elevated against the tension power of the spring 61 by .avertically reciprocating rod 73 which is actuated by a tension spring 63 forcing a roller on said rod down against a cam II fixed to the shaft I 9. Another arm '72 is fixed to the shaft 66 and pivotally connected to a horizontal rod 13 which may be moved .to and from the rod 46 above the flange 4i.

In operation, when an empty bag'l has been moved into position beneath the casing 33 the walls 4 are moved by the rod 26 towards the wall 3 so that the rectangular casing thereby ob tained encloses the bag. Thereupon the cam 26 permits the arm 23 and thus also the arm 8 to move upwards so that the plate 6 will move the bag I upwards against the casing 33 and put it thereon.- The casing 33 having its bottom end bevelled towards its curvatures 5i permits the bag to readily be put on the casing even though said bag is slightly wider than said casing. The entire space between the feed screws 35 and the bore of the casing is always .fllled with flour "as the lattice 63 prevents flour from accidentally dropping out of the discharge end of the casing 33. When the bag is put on the casing 33 air will escape upwards along the curvatures 5i. When the bag has been moved into filling position the rolls 52 are automatically moved towards the bag into the position shown in dash and dot lines in Fig. 2 and they will force the mantle of the bag against the curved sections 5i 70 of the casing so that said mantle is stretched and will enclose tightly the casing. Thus the bag will obtain a determined shape correspond-- moulding action to a distinct rectangular form.

When the arm 8 has moved upwards the arm ,26 has caused the screw 21 to turn the switch IE to the left thereby interrupting the electric circuit so that no current will pass the electromagnet 49. Then the rod 46 together with the core 46 are free to ascend under the influence of the spring 50 so that the clutch 38 will be engaged and the continuously rotating motor shaft will cause the feed screws 35 to rotate and material is supplied to the bag I covering the casing 33. on continuing the supplying operation the plate 6 yields downwards under the influence of the increasing gravity of the contents of the bag as well as by the material pressure whilst straining the spring 25. The rollers 5 as well as the walls 3 and 4 mould the descending filled bag to the perfect shape desired, said moulding being easily executed due to the fact that the filled bag has previously been rendered a preliminary shape corresponding to its flnal shape. 0n the descending movement of the bag the roll 2| is in engagement with a reduced portion of the cam 20. Preliminarily in the fllling operation the shoulder II is brought out of engagement with the screw 24. The material supply is interrupted before the plate 6 has reached its lowermost position thereby that the arm l2 together with the finger i3 move the switch I6 to the right so that the electric circuit through the electromagnet 49 is closed and the core 48 together with the rod 46 are forced downward thereby disengaging the clutch 38. Simultaneously the walls 4 are retracted by the rod 23. The downward movement of the plate 6 together with the bag I is continued under the influence of a projecting portion of the cam 26 forcing the link I8 downward thereby moving also the arm 23 downward so that the screw 24-will engage the shoulder II. Then the finger i3 yields as shown in Fig. 1 till the plate 6 has descended to such a position that the filled bag is resting on the conveyor 2.

In case a bag having been omitted on the conveyor 2 so that no bag has been brought into filling position covering the casing 33 when the supply of material is to commence, provisions are made to prevent flour from dropping upon the moulding members 3, 4 and 5 and injuriously aifecting their perfect operation.

For this purpose the difierent driving means operate in such timed relation that the rod I6 will be moved downward by the spring 66 immediately after the plate 6 having reached its top position. Then the tongue 64 is moved inwards by means of the spring 61 to engage the part of v the bag supposed to cover the curvatures 5i of the casing. Said part of the bag is indicated in dash and dot lines in Fig. 4. As the spring 61 is rather weak the inward movement of the tongue 64 is arrested if itengages the bag so that the movement of the rod 73 is interrupted before the end of said rod having reached a position above the flange 41, and then the rod 46 may when the electric circuit is interrupted be moved upwards by the spring 50 and start the rotary movement of the screws 35. If however the casing 33 is not covered by any bag the tongue 65 is free to move into the curvature 5i, and the rod I3 moves to the right until it projects above the flange 47. Then when the circuit is interrupted the rod 46 cannot ascend as the flange 41 will engage the end of the ,rod 13 so that starting of the feed screws 35 cannot occur until next operation cycle.

The sensitive means including the tongue 64 may of course be developed in manners difierent from that heretofore described. Thus it may be arranged to move against the upper edge of the bag i or it may be developed yieldingly so that it is actuated by the bag when the latter is elevated. Instead of being arranged to prevent starting 01' driving means or the feed screws as heretofore described said sensitive means may also be arranged to start said driving means for instance if they are developed as a switch.

We claim:

1. In a machine for filling and forming packages, a plurality of screw shaped feed members for supplying material to a package and having ends in the proximity or one another, rollers arranged adjacent said ends to engage side walls of a package to be formed and constituting an opening having approximately the same crosssectional area as said conveyor, an elevator member, and a mechanism for moving said elevator member towards said feed member ends to elevate the package into a filling position at said ends, said elevator member being movable back from said ends to allow the package to descend within said opening.

2. In a machine for filling and forming packages, a plurality of screw shaped ieed members for supplying material to a package and having ends in the proximity of one another, movable rollers arranged adjacent said ends to engage side walls of a package to be formed and constituting an opening having approximately the same cross-sectional area as said conveyor, an elevator member, and a mechanism for moving said elevator member towards said feed member ends to elevate the package into a filling position at said ends, said elevator member being movable back from said ends to allow the package to descend within said opening.

3. In a machine for filling and forming packages, a screw conveyor comprising a plurality of screw shaped feed members for supplying material to a package and having ends in the proximity of one another, moulding means arranged adjacent said ends polygonally to enclose the side walls of the package to be formed and constituting substantially an extension of said conveyor and having approximately the same interior cross-sectional area as said conveyor, and a mechanism for yieldingly moving the package into filling position at said feed member ends and within said moulding means.

4. In a machine for filling and forming packages, a screw conveyor comprising a plurality of screw shaped feed members for supplying material to a package and having ends in the proximity of one another, moulding means arranged adjacent said ends polygonally to enclose the side walls of the package to be formed and constituting substantially an extension of said conveyor and having approximately the same interior cross-sectional area as said conveyor, a mechanism for yieldingly moving the package upwards into filling position at said feed member ends and within said moulding means, and means for'arrest ing the yielding downward movement of said mechanism at a predetermined filling position.

5. In a machine for filling and forming packages, a screw conveyor comprising a plurality of screw shaped teed members for supplying material to a package and having ends in the proximity of one another, molding means arranged adjacent said ends polygonally to enclose the side walls of the package to be formed and constituting substantially an extension or said conveyor and having approximately the same interior cross-sectional area as said conveyor, and a mechanism for moving the package into filling position at said teed member ends and within said molding means.

6. In a machine for filling and forming packages, a screw conveyor comprising a plurality of screw shaped feed members for supplying material to a package and having ends in the proximity of one another, molding means arranged adjacent said ends polygonally to enclose the side walls of the package to be formed and constituting substantially an extension of said conveyor and having approximately the same interior cross-sectional area as said conveyor, an elevator member, and a mechanism for moving said elevator member within said molding means toward said teed member ends to elevate the package into a filling position at said ends, said elevator member being movable back from said ends to allow the package to descend into said molding means.

'7. In a machine for filling and forming packages, a screw conveyor comprising a plurality of screw shaped teed members for supplying material to a package and having ends in the proximity of one another, molding means arranged adjacent said ends polygonally to enclose the side walls of the package to be formed and constituting substantially an extension of said conveyor and having approximately the same interior cross-sectional area as said conveyor, an elevator member, and a mechanism for moving said elevator member within said molding means toward said feed member ends to elevate the package into a filling position at said ends, said elevator member being yieldingly movable back from said ends to allow the package to descend into said molding means.

8. In a machine for filling and forming packages, a screw conveyor comprising a plurality of screw shaped feed members for supplying material to a package and having ends in the proximity of one another, molding means arranged adjacent said ends to enclose the side walls of the package to be formed and constituting an interiorly polygonal casing which is substantially an extension of said conveyor and has approximately the same interior cross-sectional area as said conveyor, an elevator member, and a mechanism for moving said elevator member within said casing toward said feed member ends to elevate thepackage into a filling position at said ends, said elevator member being movable back from said ends to allow the package to descend into said casing.

9. In a machine for filling and forming packages, a screw conveyor comprising a plurality of screw shaped feed members for supplying material to a package and having ends in the proximity of one another, molding means comprising a plurality of plates arranged adjacent said ends to form an interiorly polygonal casing enclosing the side walls of a package to be formed and constituting substantially an extension of said conveyor and having approximately the same interior cross-sectional area as said conveyor, means for moving said plates apart, an elevator member, and a mechanism for moving said member within said casing toward said feed member ends to elevate the package into a filling position at 10. In a machine for filling and forming packages, a screw conveyor comprising a plurality of screw shaped feed members for supplying material to a package and extending alongside of one another and having ends in the proximity of one another, a casing having a Joint chamber for said feed members and having an interior cross section accommodated to the joint cross-sectional outline of said feed members, molding means arranged adjacent said feed member ends polygonally to enclose the side walls or the package to be formed and constituting substantially an extension of said conveyor and having approximately the same interior cross-sectional area as said chamber, an elevator member, and a mechnism for moving said elevator member within said molding means towards said feed member ends to elevate the package into a filling position at said feed member ends, said elevator member being movable back from said ends to allow the package to descend into said molding means.

11. In a machine for filling and forming packages, a screw conveyor comprising a plurality of screw shaped feed members for supplying material to a package and extending alongside of one another and having ends in the proximity of one another, a casing enclosing said feed members and having an exterior outline slightly wider than the joint cross-sectional outline of said feed members, molding means arranged adjacent said feed member ends polygonally to enclose the side walls of the package to be formed and constituting substantially an extension of said conveyor and having approximately the same interiorcross-sectional area as said casing, an elevator member, Y

and a mechanism for moving said elevator member within said molding means towards said feed member ends to elevate the package into a filling position at said feed member ends, said elevator member being movable back from said ends to allow the package to descend into said molding means.

12. In a machine for filling and forming packages, a plurality of screw shaped feed members for supplying material to a package having ends in the proximity of one another and extending alongside of one another, a casing having a discharge end and enclosing said feed members and having a rounded non-circular exterior outline slightly wider than the joint circular outline of said feed members, molding means arranged adjacent said discharge end to enclose the side walls of the package to be formed, an elevator member, a mechanism for moving said elevator member within said molding means towards said dis: charge end to elevate the package into a filling position at said end driving means for said feed members, and sensitive means mounted in the proximity of said casing and operatively connected to said driving means to control the movements of said driving means in dependence of the presence of a bag on said casing, said molding means constituting substantially an extension of said casing and having a polygonal interior cross section, said outline of the casing covering approximately said polygonal cross section of the molding means, said casing being contracted exteriorly between sections enclosing the different feed members, said sensitive means being movable towards said casing where said casing is contracted to arrest said driving means, said elevator member being movable back from said discharge and to allow the package to descend into said molding means.

13. In a machine for filling and forming packages, a plurality of screw shaped feed members for supplying material to a package having ends in the proximity of one another and extending alongside of one another, a casing having a discharge end and enclosing said feed members and having a rounded non-circular exterior outline slightly wider than the joint circular outline of said feed members, molding means arranged adiacent said discharge end to enclose the side walls of the package to be formed, an elevator member, a mechanism for moving said elevator member within said molding means towards said discharge end to elevate the package into a filling position at said end and pressing members, said molding means constituting substantially an extension of said casing and having a polygonal interior cross section, said outline of the casing covering approximately said polygonal cross section of the molding means, said casing being contracted exteriorly between sections enclosing the different feed members, said pressing members being movable towards said casing where said casing is contracted to tightly press the wall of a bag against the casing, said elevator member being movable back from said discharge end to allow the package to descend into said molding means.

14. In a machine for filling and forming packages, a plurality of screw shaped reed members for supplying material to a package having ends in the proximity of one another and extending alongside of one another, a casing having a discharge end and enclosing said feed members and having a rounded non-circular exterior outline slightly wider than the joint circular outline of said feed members, molding means arranged adjacent said discharge end to enclose the side walls of the package to be formed, an elevator member,

and a mechanism for moving said elevator member within said molding means towards said discharge end to elevate the package into a filling position at said end said molding means constituting substantially an extension of said casing and having a polygonal interior cross section, said outline of the casing covering approximately said polygonal cross section 01 the molding means, said casing being contracted exteriorly between sections enclosing the different feed members, said discharge end being bevelled in such manner that it has ridges at the contracted parts of said casing, said elevator member being movable back from said discharge end to allow the package to descend into said molding means.

15. In a machine for filling and forming packages, a screw conveyor comprising a plurality of screw shaped members for supplying material to a package and extending alongside of one another in a joint chamber and having ends in the proximity of one another, means for rotating said feed members in the same direction, molding means arranged adjacent said feed member ends polygonal ly to enclose the side walls of the package to be formed and constituting substantially an extension of said conveyor and having approximately the same interior cross-sectional area as said conveyor, an elevator member, and a mechanism for moving said elevator member within said molding means toward said feed member ends to elevate the package into a filling position at said ends,-said elevator member being movable back from said ends to allow the package to descend into said molding means.

16. In a machine for filling and formingpackages, a screw conveyor comprising a plurality of screw shaped feed members for supplying material to a package and extending alongside of one another and having ends in the proximity of one another, driving means for rotating said feed members, a casing enclosing said feed members and having an exterior cross-sectional outline slightly wider than the joint cross-sectional outline of said feed members, molding means arranged adjacent said ieed member ends polygonally to enclose the side walls of the package to be formed and constituting substantially an extension of said conveyor and having approximately the same interior cross-sectional area as said casing, sensitive means arranged above said molding means and adjacent to the wall of said cas GUSTAF ons'raom. 

